Oil-filter



(No Model.)

A. 0. DARRAG-Hr OIL FILTER.

No. 401,544. Patented Apr. 16, 1889.

WITNESSES: llVl/E/VTOR La ATTORNEY.

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ALBERT DARRAGII, OF ALLEGHENY, PENNSYLVANIA.

OIL-FILTER.

SPECIFICATION forming part of Letters Patent No. 401,544, dated April 16, 1889.

Application filed January '7, 1889. Serial No. 295,642. (No model.)

To all whom, it may concern:

lie it known that I, ALBERT DARRAGH, a citizen of the United States, residing in the city and county of Allegheny, and State of Pennsylvania, have invented or discovered a certain new and useful Improvement in an Oil-Filter, of which improvement the following is a specification.

The purpose of my invention is to construct a simple, inexpensive, and rapid filter for oil or other liquids lighter than water. The filter will also act as a dust-tight reservoir for the filtered oil. It is found to be particularly adapted for filtering the drippings from machinery for reuse. Itis also desirable to filter lubricating-oils before any use is made of them, as they frequently contain dust and dirt, injurious to bearings.

In the accompanying drawin which make part of this specification, Figure 1 is a perspective view, broken away and partly in see- Fig. 2 is a longitudinal central section of the filter.

The filter is composed of the following parts: The shell 1 is preferably made of galvanized iron of varying sizes, according to the amount of oil to be filtered and the rapidity of filtering required. The shell shown in the drawings is about forty-four inches in height and twenty-four inches in diameter.- The top 2 2 of the filter is made removable. The receiver is also detachable from the top 9 of the filter, and may, if desired, be filled with white waste or other fibrous matter. Inside the receiver is the funnel 4, having at its base a strainer of wire-cloth, 5, preferably sixteen mesh to the inch. The receiver has a lid, 6, with handle 7. From the centerof the bottom of the receiver 23, and connected thereto with a tight joint, extends a short pipe-section, 8, into the stand-pipe 9. The latter is a tube (here one and one half inch in diameter) and extending to the bottom of the shell 1. The stand-pipe E) is perforated at its lower end, and about midway of its length has a flange, 10, which supports the filter-disk 11. There is also a ledge (not shown) running around the inner circumference of the shell, which also supports the disk 11. As is shown more clearlyin Fig. 2, the disk is made of two layers of hair felt, 12, each two inches in thickness, preferably inclosed in a flannel sack.

The upper and lower surfaces of the disk are covered with wire-cloth, 13, of the same mesh as above indicated. The circumference of the disk is stiffened by the wire hoops 1% 1a.

The parts of the disk are not numbered in Fig. 1 to avoid confusion in the drawings. Instead of using felt in the filter-disk 11, as best-us, white waste, charcoal, bone-dust, and many fibrous or vegetable materials may be used. It will be noted that the disk 11 is free. to float upon the stand-pipe 9 as a stem.

The base of the stand-pipe 9 projects into a second funnel, 15, having strainer of wirecloth, 16, preferably of the finencssabove described. The funnel is guided to its seat over the wash-cock 18 by the guide 17 17, which is perforated at its base. The bottom of the filter slopes to its center, to insure perfect drainage.

19 is a water-gage to indicate height and purity of the water.

20 is a steam-pipe to keep water and filtering oil at a proper temperature in cold weather.

21 is afaucct to draw off the oil. The shell 1 of the filter extended about six or eight inches below the bottom of the filter, and the front of the shell at the bottom is cut away to reach the wash-cock 18 with the hand.

In using my filter the oil is poured in at the funnel 4:, passes through the strainer 5 into standpipe 9, (which is filled with water from. the chamber surrounding it to about an inch below the flange 11 down the stand-pipe 9 and through its perforations, depositing most of its impurities in the funnel 15,111) through the strainer 10 and through the large body of water below the filter-disk 11 and through the filter-disk 11 into the chamber above, where it is stored till needed.

As my filter-disk 11 is very large, being of the same diameter the shell 1, the filtering is carried on very rapidly.

\Vhen it is necessary to clean the filter, all oil can be drawn off by pouring in an excess of water. hen the oil has been exhausted, the waste-cock 1S drains oif all water and sediment. The top 2 2,with receiver and funnel,

is then lifted off and the stand-pipe O pulled up, bringing with it the filter-disk and lower funnel, leaving nothing but the guide in the can.

The following parts, while omitribnting to the efficieney of my invention, are not absolutely indispenable to the resultviz., the funnel in the receiver, the receiver, the pipesection 8, and the lower funnel, 15, with its strainer. There must be, however, some means for straining the oil before it passes down the stand-pipe 9.

Having fully described my invention, What I desire to secure by Letters Patent is In a combined filter and reservoir, the combination of a shell, a receiver containing a funnel with a strainer and having a short pipe-section proj ecting from its base, a standpipe extending from said receiver into a funnel, provided with a strainer at the base of the filter, a guide supporting said funnel, aWashcock at the bottom of the filter, and a filterdisk forming the bottom of the reservoir and separating said reservoir from the Waterchamber, all substantially as and for the purposes set forth.

In testimony whereof I have hereunto set my hand.

WVM. L. PIERCE, JAMES F. RoBB. 

